<android.support.v4.view.ViewPager        android:id="@+id/pager"        android:layout_width="match_parent"        android:layout_height="0dp"        android:layout_weight="1" />

public class MyViewPagerAdapter extends PagerAdapter{        private List<View> mListViews;        public MyViewPagerAdapter(List<View> mListViews) {            this.mListViews = mListViews;//构造方法，参数是我们的页卡，这样比较方便。        }        @Override        public void destroyItem(ViewGroup container, int position, Object object)   {            container.removeView(mListViews.get(position));//删除页卡        }        @Override        public Object instantiateItem(ViewGroup container, int position) {  //这个方法用来实例化页卡            container.addView(mListViews.get(position), 0);//添加页卡            return mListViews.get(position);        }        @Override        public int getCount() {            return  mListViews.size();//返回页卡的数量        }        @Override        public boolean isViewFromObject(View arg0, Object arg1) {            return arg0==arg1;//官方提示这样写        }    }